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Digital BW, The Print

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RE: [Digital BW] jpg vs. raw

2005-07-07 by Paul D. DeRocco

> From: Richard
>
> Since when did Photoshop introduce noise into a digital image.
> Surely it has to be there in the first place.

In the color management settings, there's a checkbox for enabling dithering
in 8-bit mode. This causes it to add a tiny bit of noise when doing color
space conversions, so that you don't wind up with posterization. I don't
know the exact algorithm, but could make some semi-educated guesses. It's
not enough noise that you'd actually notice it. And it doesn't do this in
16-bit mode.

There's also a dither option in the gradient tool, which is generally a good
thing to turn on.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

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